<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
  <el-header>
    <div>
      <img src="../assets/heima.png" alt="">
      <span> 电商后台管理系统 </span>
    </div>
    <el-button type="info" @click='logout'>退出</el-button>
  </el-header>
    <!-- 页面主题区域 -->
  <el-container>
    <!-- 侧边栏区域 -->
    <el-aside :width="isCollapse ? '64px': '200px'">
      <!-- 折叠按钮 -->
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <!-- 侧边栏菜单区 -->
      <el-menu :default-active="activePath" background-color="#333744" text-color="#fff" active-text-color="#409bff" unique-opened :collapse='isCollapse' :collapse-transition='false' router>
         <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
         <!-- 一级菜单模版区 -->
        <template slot="title">
            <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
           <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index=" '/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
          <template slot="title">
            <!-- 图标 -->
          <i class="el-icon-menu"></i>
           <!-- 文本 -->
          <span>{{subItem.authName }}</span>
        </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [],
      // 字体图标
      iconsObj: {
        125: 'iconfont icon-user ',
        103: 'iconfont icon-tijikongjian ',
        101: 'iconfont icon-shangpin ',
        102: 'iconfont icon-danju ',
        145: 'iconfont icon-baobiao '
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的连接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      // 清除tokenStr数据
      window.sessionStorage.clear()
      // 强制跳转回登陆页面
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      // console.log(res)
    },
    // 是否折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存连接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
  .home-container {
    height: 100%;
  }
  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div {
      display: flex;
      align-items: center;
      span {
        margin-left: 15px;
      }
    }
  }
  .el-aside {
    background-color: #333744;
    .el-menu {
      border-right: none;
    }
  }
  .el-main {
    background-color: #eaedf1;
  }
  .iconfont {
    margin-right: 10px;
  }
  .toggle-button {
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
